The Slider filter supports selecting a range of numeric values, which is why it shows two slider handles in this scenario. The minimum and maximum values of this numeric range need to be set next (unless the defaults of 0 and 100 are appropriate for your data).

Go to Properties for the slider filter:

Set Value (First) to 0 - This is the first slider (handle) value.

Set Value (Second) to 1000 - This is the second slider value (if slider is in range mode).

3. Filtering a single numeric value

Another approach is to start from the beginning and add a Single Number filter first. This will automatically give you an associated view parameter (viewParameter 1) that supports a single value. Next, delete the Single Number filter but say no when it asks if you want to delete associated view parameters. Add a Slider filter. In the Filter Visualizations panel, click Parameters in the top-right and connect to viewParameter 1 instead.

4. Properties

4.1. Show Min / Max Labels

Under Look Properties, use the Show Min / Max Labels property to display the minimum and maximum slider values as labels.